ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Electroluminescence spectra of 80 A(ring) GaxIn1−xP/(Al0.6Ga0.4)0.5In0.5P quantum wells (QWs), with x=0.3, 0.4, 0.5, and 0.6, are examined. The polarization is anisotropic, and the light-hole (lh) and heavy-hole (hh) transitions are resolved at current densities between 1 A/cm2 and threshold. In the compressively strained (x=0.3, 0.4) QWs, the hh is ground state and transverse electric-mode emission dominates. The lh and hh band edges are reversed for the tensile-strained QW, however, and the emission is predominantly transverse magnetic. Near threshold, the bandfilling effect is most pronounced in the compressively strained QWs, suggesting a reduced in-plane hh effective mass. For the most highly compressed QW (x=0.3, λ=707 nm), the threshold current density is 190 A/cm2.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.109048
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